TW201411807A - Light source device with organic light-emitting diode - Google Patents

Abstract

An organic light emitting diode (OLED) light source device comprises a down substrate, a plurality of OLED modules mounted on the down substrate and arranged by matrix, a bus electrode forming a net structure around each of the OLED modules for connecting the OLED modules in parallel, and an up substrate set on the OLED modules and the bus electrode. The disclosure enables the OLED light source able to be cut arbitrarily to change the shape of the light source as well as does not affect the life time and performance of the light source by using the bus electrode. Therefore, the disclosure will increase the design range and applications of the OLED light source.

Description

Organic light emitting diode light source device

The present disclosure relates to a light source device, and more particularly to an organic light emitting diode light source device.

An Organic Light Emitting Diode (OLED) utilizes a combination of a conduction band and an electron hole between a valence band to excite energy in the form of light. Therefore, a polymer organic film having semiconductor material properties can be used. It is used as a transmission layer for providing electrons and holes, and as a light-emitting layer for electron-holes to composite light. Since the organic light-emitting diode is a thin film process, it is different from the necessity of a complicated epitaxial process to generate P and N type electrons and a hole transport layer, so that the substrate material can only select gallium arsenide or tantalum carbide (SiC). Or a Light Emitting Diode (LED) component of a rigid opaque substrate such as Sapphire. The substrate of the organic light-emitting diode can be selected from a transparent substrate which is generally opaque, and a transparent glass substrate can be used, even extending to a flexible plastic substrate. In addition, since the organic light emitting diode is a self-luminous body, a structure such as a backlight module and a color filter is not required, and the thickness of the diode module can be further reduced. In addition to its advantages of lightness, flexibility and low glare, its high color rendering and special performance of the full spectrum make it the focus of next-generation lighting technology.

However, at present, most of the illuminating devices using organic light-emitting diodes are fixed-sized products, regardless of their size and shape, and are fixed specifications. However, fixed-size light source devices cannot satisfy users in some cases. Demand, such as corner areas in certain building rooms, specially shaped spaces, or variability requirements based on indoor spaces. As a result, current lighting equipment does not provide sufficient flexibility for external variations, resulting in lighting design or application that must match existing lighting specifications.

Therefore, how to improve the organic light-emitting diode light source device to have the characteristics of cutting and preventing moisture intrusion to increase the range of design and application of the organic light-emitting diode light source device has become a field in the art. Urgent issues to be solved.

The present disclosure provides an organic light emitting diode light source device, comprising: a lower substrate; a plurality of organic light emitting diode modules disposed on the lower substrate and arranged in a matrix, comprising: a first electrode layer formed on On the lower substrate, an organic light emitting diode chip is formed on the first electrode layer; and a second electrode layer is formed on the organic light emitting diode chip; a bus circuit is surrounded by the organic The illuminating diode module is formed in a network structure for connecting the OLED modules in parallel, and includes: a first bus line formed on the lower substrate and electrically connected to the first electrode layer; An insulating layer is formed on the first bus line; and a second bus line is formed on the insulating layer and electrically connected to the second electrode layer; and an upper substrate is coupled to the plurality of organic light emitting diodes The module is connected to the bus circuit.

In the above organic light emitting diode device, the organic light emitting diode module has a package frame structure, so that each of the organic light emitting diode modules has an independent package boundary, so that each of the cut Organic light emitting diode The life of the body module is not affected by the cutting.

The present disclosure provides an organic light emitting diode light source device, comprising: a lower substrate; a plurality of organic light emitting diode modules disposed on the lower substrate and arranged in a matrix, comprising: a first electrode layer formed on On the lower substrate, a first color organic light emitting diode chip is disposed on the first electrode layer, and a second electrode layer is formed on the upper surface of the first color organic light emitting diode chip; a light emitting diode chip is disposed on the first electrode layer, and a third electrode layer is formed on an upper surface of the second color organic light emitting diode wafer; and a third color organic light emitting diode chip is disposed On the first electrode layer, a fourth electrode layer is formed on the upper surface of the third color organic light emitting diode chip; a bus circuit surrounds each of the organic light emitting diode modules to form a mesh The structure is configured to connect the OLED modules in parallel, and includes: a first bus line formed on the lower substrate and electrically connected to the first electrode layer; and a first insulating layer formed on the first Bus line a second bus line formed on the first insulating layer and electrically connected to the second electrode layer; a second insulating layer formed on the second bus line; and a third bus line formed on the second bus line The third insulating layer is electrically connected to the third electrode layer; the third insulating layer is formed on the third bus line; and the fourth bus line is formed on the third insulating layer and electrically connected to the a fourth electrode layer; and an upper substrate coupled to the plurality of organic light emitting diode modules and the bus circuit.

In the above organic light emitting diode device, the organic light emitting diode module has a package frame structure, so that each of the organic light emitting diode modules has an independent package boundary, so that each of the cut Organic light emitting diode The life of the body module is not affected by the cutting.

The present disclosure further provides an organic light emitting diode light source device, comprising: a lower substrate; a plurality of organic light emitting diode modules disposed on the lower substrate and arranged in a matrix, comprising: a first electrode layer formed on On the lower substrate, an organic light emitting diode chip is formed on the first electrode layer; and a second electrode layer is formed on the organic light emitting diode chip; a bus circuit is used for parallel connection The OLED module includes: a first planar electrode formed on the lower substrate; a first insulating layer formed on the first planar electrode; and a first bus line formed on the first insulating layer The first electrode layer is electrically connected to the first electrode layer, and is electrically connected to the first planar electrode through the first conductive blind hole; the second insulating layer is formed on the first bus line; the second bus line is Formed on the second insulating layer and electrically connected to the second electrode layer; a third insulating layer is formed on the second bus line; and a second planar electrode is formed on the third insulating layer and transparent Second conductive blind hole and the Two planar electrode electrically connected; and an upper substrate binding based on the plurality of OLED circuit module to the bus.

In the above organic light emitting diode device, the organic light emitting diode module has a package frame structure, so that each of the organic light emitting diode modules has an independent package boundary, so that each of the cut The life of the organic light-emitting diode module is not affected by the cutting.

Compared with the prior art, the organic light-emitting diode light source device of the present disclosure is a plurality of organic light-emitting diodes connected in parallel by a sink circuit, so that the organic light-emitting diode light source device can be arbitrarily cut and changed outside the light source. Type, at the same time, each piece of light source after cutting can be independently and uniformly illuminated, and its life is used. The life and luminescence properties are not affected, so the range of design and application of the organic light-emitting diode light source device is greatly improved.

The embodiments of the present disclosure are described below by way of specific embodiments, and those skilled in the art can readily understand the other advantages and advantages of the disclosure. The disclosure may also be practiced or applied by other different embodiments.

1A is a schematic top view of an embodiment of an organic light-emitting diode light source device of the present disclosure, and FIG. 1B is a schematic cross-sectional view taken along line A-A' of FIG. 1A. As shown in the figure, the organic light-emitting diode light source device 1 of the present disclosure includes a lower substrate 10, a plurality of organic light-emitting diode modules 11, a bus circuit 12, and an upper substrate 13.

The organic light emitting diode module 11 is disposed on the lower substrate 10 and arranged in a matrix, and includes a first electrode layer 111 formed on the lower substrate 10 and an organic light formed on the first electrode layer 111. The diode wafer 112 and the second electrode layer 113 formed on the organic light emitting diode wafer 112.

In this embodiment, the organic light emitting diode chip 112 is composed of an electron injection layer, an electron transport layer, a light emitting layer, a hole transport layer, and a hole injection layer.

The first electrode layer 111 can be the cathode of the organic light emitting diode module 11 , and the second electrode layer 113 can be the anode of the organic light emitting diode module 11 .

The organic light emitting diode module 11 further includes a package frame structure 114, such that each of the organic light-emitting diode modules 11 has a separate package boundary, wherein the material of the package frame structure 114 is a UV-curable encapsulant or glass glue, and further, the ultraviolet curing An encapsulant or a glass adhesive can bond the lower substrate 10 and the upper substrate 13.

The bus circuit 12 surrounds each of the organic light emitting diode modules 11 to form a mesh structure for connecting the organic light emitting diode modules 11 in parallel, including the first bus line 121, the insulating layer 122, and the first Two bus lines 123.

The first bus line 121 is formed on the lower substrate 10 and electrically connected to the first electrode layer 111 or the same layer as the first electrode layer 111.

The insulating layer 122 is formed on the first bus line 121 to prevent the first bus line 121 and the second bus line 123 from being short-circuited.

The second bus line 123 is formed on the insulating layer 122 and electrically connected to the second electrode layer 113 or the same layer as the second electrode layer 113.

In this embodiment, the material forming the insulating layer 122 may be cerium oxide (SiO ₂ ).

In this embodiment, the upper substrate 13 and the lower substrate 10 are made of glass or plastic, and may have a water blocking layer and a gas barrier layer, wherein the water blocking layer and the gas barrier layer may be deposited by atomic layer (Atomic layer). Deposition, ALD) method of vapor deposition of an aluminum oxide layer (Al ₂ O ₃ ).

In this embodiment, the upper substrate 13, the lower substrate 10 or both of them may have a cutting line C, and the cutting line C is formed on the outer peripheral edge of the organic light emitting diode module 11 The substrate 13 or the lower substrate 10, Used as a benchmark for cutting.

As shown in FIG. 1C, a wire contact structure 120 having the first bus line 121 and the second bus line 123 offset from each other is disposed at a position corresponding to the cutting line C of the bus circuit 12 to facilitate connection of an external drive. power supply.

As shown in FIG. 1D, the organic light-emitting diode light source device 1 of the present disclosure can be arbitrarily cut along the cutting line C.

As shown in FIG. 1E, in order to cut into a more detailed pattern, each of the organic light-emitting diode modules 11 must be finely reduced in area. Although the tolerance of the cutting boundary is also reduced at this time, it is inevitable that the organic light-emitting diode module 11 is traversed at the boundary and damaged, because the organic light-emitting diode module The area of 11 has been reduced to a level that can be ignored by the human eye, and therefore has no effect on the overall luminous effect and appearance.

In addition, in one embodiment of the organic light-emitting diode light source device 1 of the present disclosure, the organic light-emitting diode module 11 is in a parallel mode, and therefore, after any cutting, the cut light source device is required. The voltage of the power supply and the required voltage of the OLED module are the same as those before the cutting, and the required wattage of the power supply is proportional to the number of modules in the light source device after cutting. For example, each OLED module 11 requires 1 watt, and after cutting the light source device contains 10 OLED modules 11, the power supply must provide 10 watts for the cutting. After the light source device.

2A is a schematic top view of another embodiment of the organic light-emitting diode light source device of the present disclosure, and FIG. 2B is a B-B' in FIG. 2A. A schematic cross-sectional view of a line segment. As shown, the organic light-emitting diode light source device 2 of the present invention includes a lower substrate 10, a plurality of organic light-emitting diode modules 11', a bus circuit 12', and an upper substrate 13. The difference from the first embodiment is that the organic light emitting diode module 11 ′ includes a first electrode layer 111 ′, a first color organic light emitting diode chip 112R, and a second color organic light emitting diode chip 112G. And a third color organic light emitting diode chip 112B, and the bus circuit 12' includes a first bus line 121', a first insulating layer 122', a second bus line 123', a second insulating layer 124', and a third current Line 125', third insulating layer 126', and fourth bus line 127'. In addition, the other structures are substantially the same as those of the organic light emitting diode light source device of the first embodiment, and therefore will not be described again.

The first electrode layer 111' is formed on the lower substrate, the first color organic light emitting diode chip 112R is disposed on the first electrode layer 111', and the first color organic light emitting diode chip 112R The upper surface is formed with a second electrode layer 113'. The second color organic light emitting diode chip 112G is disposed on the first electrode layer 111', and the upper surface of the second color organic light emitting diode wafer 112G A third electrode layer 115' is formed, and the third color organic light emitting diode chip 112B is disposed on the first electrode layer 111', and the upper surface of the third color organic light emitting diode chip 112B is formed. The fourth electrode layer 116'.

In this embodiment, the first color, the second color, and the third color organic light emitting diode chip are red, green, and blue organic light emitting diode chips, respectively.

The first bus line 121' is formed on the lower substrate 10 and electrically The first electrode layer 111' is connected to the same layer as the first electrode layer 111', and the first insulating layer 122' is formed on the first bus line 121'.

The second bus line 123' is formed on the first insulating layer 122' and electrically connected to the second electrode layer 113' or the same layer as the second electrode layer 113', and the second insulating layer 124 ' is formed on the second bus line 123'.

The third bus line 125' is formed on the second insulating layer 124' and electrically connected to the third electrode layer 115' or the same layer as the third electrode layer 115', and the third insulating layer 126 ' is formed on the third bus line 125'.

The fourth bus line 127' is formed on the third insulating layer 126' and electrically connected to the fourth electrode layer 116' or the same layer as the fourth electrode layer 116'.

In this embodiment, the organic light emitting diode module 11' can have three colors of red, blue, and green, and can individually control the intensity of the light to make the light emitting module exhibit different color and color temperatures, wherein the red, green, and blue colors. The organic light emitting diode chip is composed of an electron injection layer, an electron transport layer, a light emitting layer, a hole transport layer and a hole injection layer, wherein the electron injecting layer of the red organic light emitting diode chip is The first electrode layer 111' is bonded, and the hole injection layer is combined with the second electrode layer 113'; the electron injection layer of the green organic light emitting diode chip is combined with the first electrode layer 111'. And the hole injection layer is combined with the third electrode layer 115'; the electron injection layer of the blue organic light emitting diode chip is combined with the first electrode layer 111', and the hole injection layer is The fourth electrode layer 116' Combine.

As shown in FIG. 2C, at the position corresponding to the cutting line C of the bus circuit 12', the first bus line 121', the second bus line 123', the third bus line 125', and the The wire junction structure 120' of the four bus lines 127' are staggered from each other to facilitate connection of an external driving power source.

Fig. 3A is a schematic top view of still another embodiment of the organic light emitting diode light source device of the present disclosure, and Fig. 3B is a schematic cross-sectional view taken along line D-D' in Fig. 3A. As shown in FIGS. 3A and 3B, the organic light emitting diode device 3 of the present disclosure includes a lower substrate 10, a plurality of organic light emitting diode modules 11, a bus circuit 12", and an upper substrate 13. This is the same as the first embodiment. The difference is that the bus circuit 12" includes a first planar electrode 128", a first insulating layer 122", a first bus line 121", a second insulating layer 124", a second bus line 123", and a third insulating layer. 126" and the second planar electrode 129". Further, other structures are substantially the same as those of the foregoing embodiment, and therefore will not be described again.

The first planar electrode 128" is formed on the lower substrate 10, and the first insulating layer 122" is formed on the first planar electrode 128".

The first bus bar 121 is formed on the first insulating layer 122 ′′ and electrically connected to the first electrode layer 111 , and is electrically connected to the first planar electrode 128 ′′ through the first conductive via 122 a”.

The second insulating layer 124" is formed on the first bus line 121", and the second bus line 123" is formed on the second insulating layer 124" and electrically connected to the second electrode layer 113. .

The third insulating layer 126" is formed on the second bus line 123" The second planar electrode 129" is formed on the third insulating layer 126" and electrically connected to the second planar electrode 129" through the second conductive via 122b".

In summary, the organic light-emitting diode light source device of the present disclosure utilizes the design of the sink circuit to enable the organic light-emitting diode light source device to be arbitrarily cut and protect the organic light-emitting diode module from moisture and moisture. Significantly increase the range of design and application of organic light-emitting diode light source devices.

The above embodiments are merely illustrative of the principles of the disclosure and its effects, and are not intended to limit the invention. Modifications and variations of the above-described embodiments may be made without departing from the spirit and scope of the invention.

1, 2, 3‧ ‧ organic light-emitting diode light source device

10‧‧‧lower substrate

11, 11'‧‧‧ Organic Light Emitting Diode Module

111, 111'‧‧‧ first electrode layer

112‧‧‧Organic Light Emitting Diode Wafer

112R‧‧‧First color organic light emitting diode chip

112G‧‧‧Second color organic light emitting diode chip

112B‧‧‧ Third color organic light emitting diode chip

113, 113'‧‧‧ second electrode layer

114‧‧‧Package frame structure

115'‧‧‧ third electrode layer

116'‧‧‧fourth electrode layer

12, 12', 12" ‧ ‧ convection circuit

120, 120'‧‧‧ wire joint structure

121, 121’, 121”‧‧‧ first bus line

122‧‧‧Insulation

122', 122"‧‧‧ first insulation

122a”‧‧‧First conductive blind hole

122b”‧‧‧Second conductive blind hole

123, 123’, 123” ‧ ‧ second bus line

124’, 124”‧‧‧second insulation

125’‧‧‧ third bus line

126', 126"‧‧‧ third insulation

127’‧‧‧fourth bus line

128"‧‧‧ first plane electrode

129”‧‧‧second planar electrode

13‧‧‧Upper substrate

C‧‧‧ cutting line

1A is a schematic top view of an embodiment of an organic light-emitting diode light source device according to the present disclosure; FIG. 1B is a schematic cross-sectional view taken along line A-A' in FIG. 1A; A schematic top view of a wire contact structure of an embodiment of the disclosed organic light-emitting diode light source device; FIG. 1D is a schematic view of the organic light-emitting diode light source device according to the disclosure; FIG. 1E is a cutting disclosure 2A is a schematic top view of another embodiment of the disclosed organic light-emitting diode light source device; FIG. 2B is a B-B' in FIG. 2A a schematic sectional view of a line segment; 2C is a schematic top view of a wire contact structure of another embodiment of the disclosed organic light-emitting diode light source device; FIG. 3A is still another embodiment of the disclosed organic light-emitting diode light source device Figure 3B is a schematic cross-sectional view taken along line DD' of Figure 3A.

1‧‧‧Organic light-emitting diode light source device

10‧‧‧lower substrate

11‧‧‧Organic LED Module

111‧‧‧First electrode layer

112‧‧‧Organic Light Emitting Diode Wafer

113‧‧‧Second electrode layer

114‧‧‧Package frame structure

12‧‧‧Convergence circuit

122‧‧‧Insulation

123‧‧‧Second bus line

C‧‧‧ cutting line

Claims (23)

An organic light-emitting diode light source device includes: a lower substrate; a plurality of organic light-emitting diode modules disposed on the lower substrate and arranged in a matrix, comprising: a first electrode layer formed on the lower substrate An organic light-emitting diode chip is formed on the first electrode layer; and a second electrode layer is formed on the organic light-emitting diode chip; a bus circuit surrounds each of the organic light-emitting diodes Forming a mesh structure around the module for paralleling each of the organic light emitting diode modules, including: a first bus line formed on the lower substrate and electrically connected to the first electrode layer; and an insulating layer Formed on the first bus line; and a second bus line formed on the insulating layer and electrically connected to the second electrode layer; and an upper substrate coupled to the plurality of organic light emitting diode modules and the On the bus circuit. The organic light emitting diode device of claim 1, wherein the organic light emitting diode module has a package frame structure, so that each of the organic light emitting diode modules has an independent package boundary. . The organic light-emitting diode light source device of claim 2, wherein the material of the package frame structure is an ultraviolet-curable encapsulant or a glass glue. The organic light-emitting diode light source device according to claim 1, wherein the material of the upper substrate and the lower substrate is glass or plastic. The OLED light source device of claim 1, wherein the first bus bar and the first electrode layer are in the same layer and the second bus bar and the second electrode layer are the same layer. The OLED device of claim 1, wherein the upper substrate, the lower substrate or both have a cutting line, and the cutting line corresponds to the organic light emitting diode module. The position of the outer circumference is formed on the upper substrate or the lower substrate. The organic light-emitting diode light source device of claim 6, wherein the bus line has a wire connecting the first bus line and the second bus line at a position corresponding to the cutting line. Point structure. The organic light emitting diode device according to claim 1, wherein the organic light emitting diode chip is composed of an electron injection layer, an electron transport layer, a light emitting layer, a hole transport layer, and a hole injection layer. And a stacking composition, wherein the electron injecting layer is combined with the first electrode layer, and the hole injecting layer is combined with the second electrode layer. An organic light emitting diode light source device includes: a lower substrate; a plurality of organic light emitting diode modules disposed on the lower substrate and Arranging in a matrix manner, comprising: a first electrode layer formed on the lower substrate; a first color organic light emitting diode chip disposed on the first electrode layer, and the first color organic light emitting diode a second electrode layer is formed on the upper surface of the wafer; a second color organic light emitting diode chip is disposed on the first electrode layer, and a third electrode is formed on the upper surface of the second color organic light emitting diode wafer And a third color organic light emitting diode chip disposed on the first electrode layer, and a fourth electrode layer is formed on the upper surface of the third color organic light emitting diode wafer; the bus circuit is surrounded by Each of the OLED modules is formed in a network structure for connecting the OLED modules in parallel, and includes: a first bus line formed on the lower substrate and electrically connected to the first An electrode layer; a first insulating layer formed on the first bus line; a second bus line formed on the first insulating layer and electrically connected to the second electrode layer; and a second insulating layer formed on the second electrode layer The second bus line a third bus line formed on the second insulating layer and electrically connected to the third electrode layer; a third insulating layer formed on the third bus line; and a fourth bus line formed on the third bus line The third insulation layer is electrically charged The fourth electrode layer is connected to the fourth electrode layer; and the upper substrate is coupled to the plurality of organic light emitting diode modules and the bus circuit. The organic light emitting diode light source device of claim 9, wherein the first color, the second color, and the third color organic light emitting diode chip are respectively red, green, and blue organic light emitting diodes. Polar body wafer. The OLED light source device of claim 9, wherein the first bus bar and the first electrode layer are in the same layer, and the second bus bar and the second electrode layer are the same The first layer, the third bus bar and the third electrode layer are in the same layer, and the fourth bus bar and the fourth electrode layer are in the same layer. The organic light emitting diode device of claim 9, wherein the organic light emitting diode module has a package frame structure such that each of the organic light emitting diode modules has an independent package boundary. The organic light-emitting diode light source device of claim 12, wherein the material of the package frame structure is an ultraviolet-curable encapsulant or a glass glue. The organic light-emitting diode light source device of claim 9, wherein the material of the upper substrate and the lower substrate is glass or plastic. The OLED light source device of claim 9, wherein the upper substrate, the lower substrate or both have a cutting line, and the cutting line corresponds to the organic light emitting diode module The position of the outer circumference is formed on the upper substrate or the lower substrate. The organic light emitting diode light source device of claim 15, wherein the first bus line, the second bus line, and the third current are disposed at a position corresponding to the cutting line of the bus circuit. A wire contact structure in which the line and the fourth bus line are staggered from each other. The organic light-emitting diode light source device according to claim 9, wherein the first color, the second color, and the third color organic light-emitting diode chip are an electron injection layer, an electron transport layer, and a light-emitting layer. The hole transport layer and the hole injection layer are sequentially stacked, wherein the electron injection layer of the first color, the second color, and the third color organic light emitting diode chip is combined with the first electrode layer, and The hole injection layers of the first color, the second color, and the third color organic light emitting diode chip are respectively combined with the second electrode layer, the third electrode layer, and the fourth electrode layer. An organic light-emitting diode light source device includes: a lower substrate; a plurality of organic light-emitting diode modules disposed on the lower substrate and arranged in a matrix, comprising: a first electrode layer formed on the lower substrate An organic light emitting diode chip is formed on the first electrode layer; and a second electrode layer is formed on the organic light emitting diode chip; a bus circuit is used to connect the organic light emitting diodes in parallel Modules, including: a first planar electrode is formed on the lower substrate; a first insulating layer is formed on the first planar electrode; a first bus line is formed on the first insulating layer and electrically connected to the first electrode a layer is electrically connected to the first planar electrode through a first conductive blind via; a second insulating layer is formed on the first bus line; and a second bus line is formed on the second insulating layer and electrically Connecting the second electrode layer; the third insulating layer is formed on the second bus line; and the second planar electrode is formed on the third insulating layer and transmits the second conductive blind hole and the second plane The electrode is electrically connected; and the upper substrate is coupled to the plurality of organic light emitting diode modules and the bus circuit. The organic light emitting diode device of claim 18, wherein the organic light emitting diode module has a package frame structure such that each of the organic light emitting diode modules has an independent package boundary. The organic light-emitting diode light source device of claim 19, wherein the material of the package frame structure is an ultraviolet-curable encapsulant or a glass glue. The organic light-emitting diode light source device of claim 18, wherein the material of the upper substrate and the lower substrate is glass or plastic. The OLED device of claim 18, wherein the upper substrate, the lower substrate or both have a cutting line, and the cutting line corresponds to the organic light emitting diode module Peripheral edge The position is formed on the upper substrate or the lower substrate. The organic light emitting diode device according to claim 18, wherein the organic light emitting diode chip is formed by an electron injection layer, an electron transport layer, a light emitting layer, a hole transport layer, and a hole injection layer. And a stacking composition, wherein the electron injecting layer is combined with the first electrode layer, and the hole injecting layer is combined with the second electrode layer.